---
title: "CVE-2026-90690: 0x4m4 HexStrike AI - Command Injection"
description: "0x4m4 HexStrike AI contains a command injection caused by manipulation of arguments in subprocess.Popen in hexstrike_server.py API Tools Endpoint, letting remote attackers execute arbitrary OS commands, exploit requires no special privileges."
url: https://panop.io/threat-heartbeat/CVE-2026-90690/
---

# CVE-2026-90690 0x4m4 HexStrike AI - Command Injection

0x4m4 HexStrike AI contains a command injection caused by manipulation of arguments in subprocess.Popen in hexstrike\_server.py API Tools Endpoint, letting remote attackers execute arbitrary OS commands, exploit requires no special privileges.

CVSS base score 7.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

2.11% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90690)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-77](https://cwe.mitre.org/data/definitions/77.html)

## Vendor fix

Update to the fixed version once available or apply the in-progress fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90690](https://nvd.nist.gov/vuln/detail/CVE-2026-90690)
- [https://github.com/0x4m4/hexstrike-ai/issues/224](https://github.com/0x4m4/hexstrike-ai/issues/224)
- [https://github.com/0x4m4/hexstrike-ai/pull/266](https://github.com/0x4m4/hexstrike-ai/pull/266)
- [https://vuldb.com/cve/CVE-2026-90690](https://vuldb.com/cve/CVE-2026-90690)
- [https://vuldb.com/submit/914892](https://vuldb.com/submit/914892)
- [https://vuldb.com/vuln/403223](https://vuldb.com/vuln/403223)
- [https://vuldb.com/vuln/403223/cti](https://vuldb.com/vuln/403223/cti)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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